IEC 61039 pdf – Classification of insulating liquids 1Scope This International Standard establishes the detailed classification of the N family (insulating liquids) that belongs to class L (lubricants, industrial oils and related products) in accordancewith IS0 8681 and lSO 6743-99, affecting product categories that include products derived from petroleum processing, synthetic chemical products and synthetic and natural esters. Normative references...